Revised Baade-Wesselink Analysis of RR Lyrae Stars
| dc.creator | Cacciari, Carla | |
| dc.creator | Clementini, Gisella | |
| dc.creator | Castelli, Fiorella | |
| dc.creator | Melandri, Fabrizio | |
| dc.date | 1999-09-21 | |
| dc.date.accessioned | 2026-07-07T02:33:24Z | |
| dc.date.available | 2026-07-07T02:33:24Z | |
| dc.description | We have applied the Baade-Wesselink method to two field RR Lyrae stars, i.e. SW And and RR Cet, and derived their distances and physical parameters. With respect to previous B-W analyses we have applied the following improvements: a) use of all sets of available data, after proper comparison for homogeneity and compatibility; b) use of the most recent and accurate model atmospheres, with turbulent velocity V(turb) = 4 km/s and the no-overshooting approximation, and comparison with other treatments of convection; c) use of the instantaneous gravity along the pulsation cycle rather than the mean value; d) comparison with modified radial velocity curves according to various assumptions on radial velocity gradients in the atmosphere; and e) careful reanalysis of the temperature scale. The main aim of this study is to evaluate the effect of the above items on the B-W results and verify whether any (or a combination) of them can possibly account for the discrepancy of the absolute magnitude zero-point with respect to other independent determinations. | |
| dc.description | 6 pages, LaTex using newpasp.sty (included). Proceedings of the IAU176 Colloquium, Budapest, Hungary, on "The Impact of Large Scale Surveys on Pulsating Star Research", Eds. L. Szabados & D. Kurtz, to appear in ASP Conf. Ser | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9909350 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9909350 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14825 | |
| dc.subject | Astrophysics | |
| dc.title | Revised Baade-Wesselink Analysis of RR Lyrae Stars | |
| dc.type | text |